2.5L NA Cracked Cylinder Head with Oil Leaking

[txt990]

I haven't seen any cracked head issues reported for the 2021 CX-5 2.5 NA with cylinder de-activation on this forum. A lot of the years I have seen are 2018-19. My brother bought a used 2021 CX-5 2.5NA one with 20k miles last year. So far its been quite reliable. He received some recall about the thermostat issue from Mazda.

 

[SimpleCanuck]

I haven't seen any cracked head issues reported for the 2021 CX-5 2.5 NA with cylinder de-activation. My brother bought a used one with 20k miles last year. He received some recall about the thermostat issue from Mazda.

Here is the one I saw in this forum involving a '22.

D

Post in thread 'Cracked cylinder head 2019 CX-5 with 26,000 miles'

Aug 15, 2023

It is still happening with the 2022 models. I just got my cylinder head replaced under warranty. It's a CX-5 2.5 S Preferred with a skyactiv engine; it's not the turbo. I bought it new in March of 2022 and it only has 13,000 miles on it. There were no warning signs or symptoms other than the low oil level light coming on. I have the oil changed twice a year, so that definitely shouldn't have happened. I stopped immediately so no damage was done to the engine. Because of the panels under the car, there was no noticeable oil leak. There was no coolant leak, no smoke, no smell.

The invoice...

• DianeJinOK

• 

 

[txt990]

Here is the one I saw in this forum involving a '22.

D

Post in thread 'Cracked cylinder head 2019 CX-5 with 26,000 miles'

Aug 15, 2023

It is still happening with the 2022 models. I just got my cylinder head replaced under warranty. It's a CX-5 2.5 S Preferred with a skyactiv engine; it's not the turbo. I bought it new in March of 2022 and it only has 13,000 miles on it. There were no warning signs or symptoms other than the low oil level light coming on. I have the oil changed twice a year, so that definitely shouldn't have happened. I stopped immediately so no damage was done to the engine. Because of the panels under the car, there was no noticeable oil leak. There was no coolant leak, no smoke, no smell.

The invoice...

• DianeJinOK

• 

Wow, so even with 2022?

 

[walt]

This video may have been posted. But if you want to check for a cracked head use a mirror as shown. As mentioned, a leak may not show up with the under body covers hiding it. 2.5NA oil leak.

 

[txt990]

This video may have been posted. But if you want to check for a cracked head use a mirror as shown. As mentioned, a leak may not show up with the under body covers hiding it. 2.5NA oil leak.

I wish Mazda would have some sort of recall or provide an extended warranty service since this is technically their fault and potentially affects so many owners.

 

[yrwei52]

I wish Mazda would have some sort of recall or provide an extended warranty service since this is technically their fault and potentially affects so many owners.

Or at least offers something like a Customer Service Program (CSP11) issued for the 2.5T to extend the limited powertrain warranty to 10 years/120K miles for any owners experiencing the coolant leak.

 

[Luny421]

Here’s a fun update, i have 269 miles on the car since the cylinder heads was replaced. I now have coolant in my oil. Talked to my friend and the service manager, dropping it back off at the dealership after work.

 

[walt]

Here’s a fun update, i have 269 miles on the car since the cylinder heads was replaced. I now have coolant in my oil. Talked to my friend and the service manager, dropping it back off at the dealership after work.

Sorry to hear that. Glad they are taking responsibility though. I am currently looking for a 4 Runner to replace my CX5. Just don't need the drama these days. LOL

 

[Moonlighter]

I wish Mazda would have some sort of recall or provide an extended warranty service since this is technically their fault and potentially affects so many owners.

Here in Australia we have a law that provides whats called a “statutory warranty” which would cover this issue for sure. Regardless of the age or mileage.

The statutory warranty, also known as a consumer guarantee, is an implied promise that goods or services are of acceptable quality and meet certain standards. This warranty applies regardless of whether the retailer or supplier provides an additional warranty, and consumers can seek remedies if the product or service fails to meet the guarantee.

An example of this law in action is the problem Mitsubishi had with the MN series (2009-2015) Triton engine, that suffered from porous engine blocks that eventually cause blown head gaskets and overheating. Mitsubishi didnt recall them, but have been forced to replace them for many years now and still do even today (largely) free of charge as its a known manufacturing fault.

The same guarantee applied to the early Mazda 2.2 diesel engines in CX5 and Mazda 6 that had failures. My brother had his CX5 diesel engine replaced at 90,000km FOC by Mazda when it was about 3 years out of Mazda warranty. He didn’t even have to invoke the statutory warranty, Mazda knew it would have to be covered and addressed it without question.

 

[Luny421]

Sorry to hear that. Glad they are taking responsibility though. I am currently looking for a 4 Runner to replace my CX5. Just don't need the drama these days. LOL

We’ll see what they say tomorrow. I made it a point to check my coolant and oil levels weekly. Weekend before last the overflow tank was below the min line but not empty. Got some FL22 from a local Mazda dealer and topped it up. Checked again this week and the overflow tank was damn near bone dry. Checked for leaks, didn’t see any pooling on the bottom cover. Checked the oil and sure enough it was FL22 green. Thankfully it’s not my only vehicle so it’s a little less of a headache.

 

[yrwei52]

We’ll see what they say tomorrow. I made it a point to check my coolant and oil levels weekly. Weekend before last the overflow tank was below the min line but not empty. Got some FL22 from a local Mazda dealer and topped it up. Checked again this week and the overflow tank was damn near bone dry. Checked for leaks, didn’t see any pooling on the bottom cover. Checked the oil and sure enough it was FL22 green. Thankfully it’s not my only vehicle so it’s a little less of a headache.

In this case you should try to demand a new engine as coolant in the oil definitely can harm the bearings、piston rings、 and many engine internal parts.

Dealer’s repair work now really can’t be trusted. There’re too many screw-ups nowadays unfortunately!

 

[walt]

Here in Australia we have a law that provides whats called a “statutory warranty” which would cover this issue for sure. Regardless of the age or mileage.

The statutory warranty, also known as a consumer guarantee, is an implied promise that goods or services are of acceptable quality and meet certain standards. This warranty applies regardless of whether the retailer or supplier provides an additional warranty, and consumers can seek remedies if the product or service fails to meet the guarantee.

An example of this law in action is the problem Mitsubishi had with the MN series (2009-2015) Triton engine, that suffered from porous engine blocks that eventually cause blown head gaskets and overheating. Mitsubishi didnt recall them, but have been forced to replace them for many years now and still do even today (largely) free of charge as its a known manufacturing fault.

The same guarantee applied to the early Mazda 2.2 diesel engines in CX5 and Mazda 6 that had failures. My brother had his CX5 diesel engine replaced at 90,000km FOC by Mazda when it was about 3 years out of Mazda warranty. He didn’t even have to invoke the statutory warranty, Mazda knew it would have to be covered and addressed it without question.

I recall walking a dealer lot on a Sunday when they were closed and
walked around back of the lot. Must have been 15 engines laying on the ground.

 

[yrwei52]

I recall walking a dealer lot on a Sunday when they were closed and
walked around back of the lot. Must have been 15 engines laying on the ground.

This reminds me that I saw a pile of Mazda’s broken rotary engines sitting in the back yard of a local Mazda dealership in 1990’s.

 

[txt990]

My brother's 2021 CX-5 Sport with 2.5 NA engine was showing some leak in the left front bumper area (black part). The car only has 22,000 miles on it and had a oil change done in January at the dealership. He noticed some and spots appearing recently and he wiped it off with a paper towel and it looks like oil.

Took it to the dealership this morning and they spent almost two hours looking for the source of the leak and they could not find it. So, they cleaned it up underneath and said everything seems ok with it.

Here are some pictures. I am sure he will have to now start monitoring this. Could these be symptoms of the cracked head issue?

 

[Luny421]

In this case you should try to demand a new engine as coolant in the oil definitely can harm the bearings、piston rings、 and many engine internal parts.

Dealer’s repair work now really can’t be trusted. There’re too many screw-ups nowadays unfortunately!

I thought I posted a follow up but apparently I didn’t. The dealership spent a day trying to find the issue. Pressure tested the cooling system and found no leaks. Checked the coolant for exhaust gases and found none. Did some sort of chemical test on the oil and found none coolant. Turns out, there was an air pocket in the cooling system causing my overflow tank to drain, and what I was seeing on the dipstick was the dye they added to the oil after the cylinder head was replaced to check for any oil leaks. They purged and topped off the coolant and went ahead and changed the oil.

 

[walt]

I thought I posted a follow up but apparently I didn’t. The dealership spent a day trying to find the issue. Pressure tested the cooling system and found no leaks. Checked the coolant for exhaust gases and found none. Did some sort of chemical test on the oil and found none coolant. Turns out, there was an air pocket in the cooling system causing my overflow tank to drain, and what I was seeing on the dipstick was the dye they added to the oil after the cylinder head was replaced to check for any oil leaks. They purged and topped off the coolant and went ahead and changed the oil.

Watch it closely. Dont trust them. My experience is when they have a certain amount of hours in it and no one is getting paid they will push it out the door till next time it comes back. I'm not out of line in saying this cause I've had it happen to me more than once. In your case basically they, the trained techs, did not purge the system as trained.
Not trying to worry you but we just gotta be our own advocate with these dealers.

 

[txt990]

My brother's 2021 CX-5 Sport with 2.5 NA engine was showing some leak in the left front bumper area (black part). The car only has 22,000 miles on it and had a oil change done in January at the dealership. He noticed some and spots appearing recently and he wiped it off with a paper towel and it looks like oil.

Took it to the dealership this morning and they spent almost two hours looking for the source of the leak and they could not find it. So, they cleaned it up underneath and said everything seems ok with it.

Here are some pictures. I am sure he will have to now start monitoring this. Could these be symptoms of the cracked head issue?

My brother will keep monitoring if this leak turns up again. He has one year left on the power train warranty. Should he show the dealer the service alert if he sees the oil leak again?

According to the carfax the car was manufactured on 4/8/2021 and first purchased on 6/4/2021.

https://static.nhtsa.gov/odi/tsbs/2023/MC-10241612-0001.pdf